Treasury secretary Janet Yellen, in one of her final major acts in office, warned Congress late Friday that the Treasury will need to begin "extraordinary measures" on Tuesday to avoid hitting the debt limit.

U.S. Treasury Secretary Janet Yellen said that the government will reach its statutory borrowing limit on Tuesday and begin employing "extraordinary measures" to keep from breaching the cap and risking a potential catastrophic default.

The breach of the debt ceiling officially starts the clock on how long Trump and Congress will have to act to avoid a financially catastrophic default.